Sum of even numbers from 1 to 56


Sum of even number

What is the sum of even numbers from 1 to 56? Here we will show you step-by-step how to calculate the sum of even numbers from 1 to 56.

Step 1) We start by finding the first (F) and last (L) even numbers from 1 to 56. It is easy to do that by simply looking at the numbers. The first even number is 2, and the last even number is 56.

F = 2
L = 56

Step 2) Next, we calculate the total even numbers (T) there are from 1 to 56, using a formula. Here is the formula and the math:

T = (L - F + 2) ÷ 2
T = (56 - 2 + 2) ÷ 2
T = 56 ÷ 2
T = 28

Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of even numbers from 1 to 56, like this:

Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (28 ÷ 2) × (2 × 2 + (2 × (28 - 1))
Sum = 14 × (4 + 54)
Sum = 14 × 58
Sum = 812
Sum of even numbers from 1 to 56 = 812


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